CM-Light 16.4ft 20led Solar Power String Fairy Lights Water Column Bubble Stick Style Solar Energy for Indoor Outdoor Home Garden Christmas Wedding Decoration (Warm White) Solar powered LED lights string, ideal decoration for gardens, patio, lawn, yard, porch, camper and all indoor and outdoor activities The solar panel charges the battery during the day by converting solar energy and the sensor will turn on the lights automatically at night The charging can only be finished under ON mode, please switch on the lights by pressing ON button at the back of solar panel before charging Two modle for this beautiful LED :Flash and Bright The lighting performance was decided by the volume of solar energy converted and stored, it may vary with the intensity of sunlight, geographic locations, weather conditions and shift of seasons